Signalling device for detecting waves in a body of water



FIG. 1 is a top perspective view of a signalling device for detecting waves in a body of water showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a bottom perspective view thereof. 

The ornamental design for a signalling device for detecting waves in a body of water, as shown and described. 